Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Sun Valley's weather, upon December's arrival, documents an average high-temperature of a still moderately hot 75°F (23.9°C), nearly identical to the prior month. Sun Valley's December nights demonstrate minimal variation from the daytime temperatures, with an average of 68.2°F (20.1°C).Humidity
The months with the highest humidity are June and December, with an average relative humidity of 76%.Rainfall
In Sun Valley, in December, it is raining for 16.5 days, with typically 2.36" (60mm) of accumulated precipitation. In Sun Valley, during the entire year, the rain falls for 238.3 days and collects up to 54.53" (1385mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of December, sunrise is at 6:52 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:39 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 6h of sunshine.UV index
In Sun Valley, the average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 6 in December translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What are the most humid months in Sun Valley?
What is the average humidity in December?
How many days does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Sun Valley have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Sun Valley have in December?
How high is the UV index in December?
Average temperature in December
Sun Valley, FL
- Average high temperature in December: 75°F
The warmest month (with the highest average high temperature) is August (86.7°F).
The month with the lowest average high temperature is January (72.5°F).
- Average low temperature in December: 68.2°F
The month with the highest average low temperature is August (81.5°F).
The coldest month (with the lowest average low temperature) is January (64°F).
Average pressure in December
Sun Valley, FL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).
Average wind speed in December
Sun Valley, FL
- Average wind speed in December: 11mph
The windiest month (with the highest average wind speed) is March (11.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in December
Sun Valley, FL
- Average humidity in December: 76%
The months with the highest relative humidity are June and December (76%).
The month with the lowest relative humidity is March (70%).
Average rainfall in December
Sun Valley, FL
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is August (9.06").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in December
Sun Valley, FL
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is August (27.3 days).
The month with the least rainy days is February (13.3 days).
Average daylight in December /
Average sunshine in December
Sun Valley, FL
- Average daylight in December: 10h and 3min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 6h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 6h and 0min).
Average sunshine days in December
Sun Valley, FL
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is March (12.7 days).
The month with the least sunshine days is July (2.3 days).
Average UV index in December
Sun Valley, FL
- Average UV index in December: 6
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in December
Sun Valley, FL
- Average cloud cover in December: 36
The months with the most cloud cover are January, October, November and December (Cloud cover 36).
The months with the least cloud cover are April and July (Cloud cover 29).
Average visibility in December
Sun Valley, FL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Sun Valley, Florida, USA
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